2008
DOI: 10.1103/physrevlett.101.021801
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Evidence forCPViolation inB0J/ψπ0Decays

Abstract: We present measurements of the branching fraction and time-dependent CP asymmetries in B0-->J/psipi0 decays based on 466 x 10(6) Upsilon(4S)-->BB over events collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the CP asymmetry parameters S= -1.23+/-0.21(stat)+/-0.04(syst) and C= -0.20+/-0.19(stat)+/-0.03(syst), where the measured value of (S, C) is 4.0 standard deviations from (0, 0) including systematic uncertainties. The branching fraction is determined to be B(B0-->J… Show more

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Cited by 30 publications
(13 citation statements)
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“…By contrast, nucleons are composite particles, and therefore inter-nucleon interactions in SRCs should lead to a deformation of the bound nucleon wave function. Such a modification of the bound nucleon is manifested in the experimental observation of the difference between partonic distributions of the free and bound nucleons, commonly referred as EMC effect (61). The most recent EMC effect measurement was performed for the wide range of nuclear targets, focussing on light nuclei (26), with the interesting observation that the extent of the modification is not proportional to the average density of nuclei but rather to the local density at which the bound nucleon is probed.…”
Section: Non-nucleonic Degrees Of Freedom and Medium Modificationsmentioning
confidence: 99%
“…By contrast, nucleons are composite particles, and therefore inter-nucleon interactions in SRCs should lead to a deformation of the bound nucleon wave function. Such a modification of the bound nucleon is manifested in the experimental observation of the difference between partonic distributions of the free and bound nucleons, commonly referred as EMC effect (61). The most recent EMC effect measurement was performed for the wide range of nuclear targets, focussing on light nuclei (26), with the interesting observation that the extent of the modification is not proportional to the average density of nuclei but rather to the local density at which the bound nucleon is probed.…”
Section: Non-nucleonic Degrees Of Freedom and Medium Modificationsmentioning
confidence: 99%
“…These measurements have established differences in the parton distribution functions (PDFs) in nuclei from those expected from an incoherent superposition of nucleons. These differences include the phenomena of shadowing, anti-shadowing [2] and the EMC effect [3]. These observations have inspired significant theoretical work (e.g.…”
Section: Introductionmentioning
confidence: 99%
“…Among the goals of the hadron structure community is to confront the physics output of the planned EIC in the US with theoretical predictions concerning the role of quarks and gluons in the structure of hadrons and nuclei. An important aspect of the program is to establish the significance of medium effects in the single-nucleon properties, and to isolate multi-body effects in the response of the nuclear medium to external currents from the sum of the single-nucleon responses, i.e., the EMC effect [92]. The first LQCD explorations of the EMC effects were conducted last year by the NPLQCD collaboration using axial and gluonic probes, albeit with unphysically heavy quarks, and the following results were reported in this conference: Figure 11.…”
Section: Structure Properties Of Light Nucleimentioning
confidence: 99%